J. Zhao, X.Y. Lu, W.W. Tan, D.Y. Yang, Y. Yang, and Z.Q. Yang,
   "Study of Smith-Purcell Free Electron Laser Using Electron Bunch Produced By Micro-Pulse Electron Gun",
   in Proc. 37th International Free Electron Laser Conference, Daejeon, Republic of Korea, August 2015, paper MOP030, pp. 93-96,
    ISBN: 978-3-95450-134-2,
    doi:10.18429/JACoW-FEL2015-MOP030,
    http://accelconf.web.cern.ch/AccelConf/FEL2015/papers/mop030.pdf, 2015.